ginna



(No Model.)

R. BARCLAY, Deod., S. A GINNA and R. A. Domnnson, Exeeutors. MACHINE FOR PRINTING METAL PLATES, 650.

No. 310.132. Patented Dec, 30, 1884.

4a MMQ-QQM WITNESSES flMW iJNITED STATES PATENT OFFICE.

STEPHEN A. GINNA, OF PLAINFIELD, N. J., AND RICHARD A. DONALDSON, OF BROOKLYN, N. Y., EXECUTORS OF ROBERT :KAECLAY, DECEASED.

MACHINE FOR PRINTING METAL PLATES, 80C.

SPECIFICATION forming part of Letters Patent No. 310,132, dated December 30, 1884-.

Application filed June 11, 1884. (No model.) Patented in England July 20, 1875, No. 2,590, and in France November '27, 1875, No. 110,404.

To all whom it may concern/.- be blurred. Several colors may be printed 50 Be it known that we, STEPHEN A. GINNA, in accurate register, either by different maof Plainiield, New Jersey, and RICHARD A. chines or by the same machine, the litho- DONALDSON, of Brooklyn, New York, both graphic stone, theinking arrangement, and the citizens of the United States, are the execucard-board sheet being changed. The same tors (appointed by the order dated May 2%), method can be applied to an impression taken 55 188%, of the Surrogate of N6WY0ll county) from type on wood and metal blocks instead of the last will and testament of ROBERT BAR- of a lithographic stone, and to impressions in CLAY, deceased, late a subject of the Queen more than one color produced on the cylin- 10 of Great-Britain, who invented certain new der clothed with the highly-glazed drawingand useful Improvements in Machines for paper or card-board, as before described. 60 Printing Metal Plates and in Fixing Durable The figure is a side view of a machine co11- Colored Impressions upon Metal Plates, (for structed according to the invention. The prinwhich said ROBERT BARCLAY received Letcipal parts only are shown.

1 ters Patent in Great Britain, No. 2,590, dated a is the frame, carrying a reciprocating ta- July 20, 1875, and in France, No. 110,494, ble, 1), on which is carried a lithographic stone; 6 dated November 27 1875,) of which the folor it may be a surface printing-block or other lowing is a specification. printing-surface.

This invention has for its object improve I) is the portion of the table I) on which the 0 inents in machinery for printing metal plates ink is distributed, the ink-rollers being carand in fixing durable colored impressions ried in the racks a on the frame to. ye upon metal plates. The frame ofthemachine c is the impression-cylinder, clothed with carries a table to which a to-and-fro motion card-board or other suitable material, 0, over is given. On the table is fixed a lithographic about half its circumference. It rotates in stone, which by the motion of the table is one direction with a surface-speed equal to carried beneath inking-rollers, and also bethat of the printing-block, but makes a pause 7 5 neath an impression or printing cylinder. To on the completion of each rotation just before the periphery of this cylinder a sheet of thin it reachesthe position shown in the drawing. card-board or drawing-paper, well sized and d is the pressure-cylinder, revolving in uni- 30 highly glazed, is attached, which receives the son with the impression-cylinder.

impression from the lithographic stone. Over 6 is a springstop. \Vhen the pause takes 80 the impression or printing cylinder is a secplace, the plate of metal to be printed is fed ond or pressure cylinder, and the tin plates up to the spring-stops, and when the cylinor other metal plates to be printed are passed ders commence again to move it is pressed between the two cylinders. The rotation of forward and made to follow the stops until the the impression or printing cylinder is not concylinders take hold of it and draw it through, 8 tinuous, but it pauses for an instant after the delivering it onto the small rollers ff. The card-board has passed over the stone, and durfeed-board is denoted by the letter m. Thus ing this pause the edge of the metal plate is during the first half of each rotation of the introduced between the impression or printimpression-cylinder the card-board surface is ing cylinder and the pressure-cylinder. The printed, and during the second half-rotation 0 plate is accurately placed against a springthe color so printed is transferred to or set off stop on the periphery of the impression or on a metal plate. This will be understood printing cylinder. \Vhen after the pause the from the figure, in which the positions of the cylinders again revolve, the metal plate passes table I) and impression-cylinder c are such that between the cylinders, and the color on the upon the usual motions being imparted to the 5 card-board is set off onto the plate. The plate table and cylinder the edge shown uppermost is delivered onto small friction-wheels, which of the yielding surface a and the nearer edge support it without allowing the impression to thereto of the part b of the table will come 2 are,

together centrally below the cylinder 0, permitting the surface 0 during the continued motion of the machinery to move over the stone or printing-surface, whereby the surface 0 receives the impression to be transferred to the tin plates and reassumes the position shown in the figure, the part Z) of the table I) being at this time at the rear end of the machine. The cylinder 0 now remains stationary until the table moves to the front end of the machine, being that illustrated in the figure, at which time the plate will be fed from the board an and the cylinders and table I) set in motion, as'before. At every revolution of the cylinder 0 it pauses until the table I) has moved to the front end of the machine. The cylinders c (2 will be provided at their ends with intermeshing gear-wheels, and the sides of the table may be provided with the usual racks, or any other means now well known for giving it the usual reciprocating motion.

The gearing and racks we have omitted from the drawing for clearness of illustration.

The metal plates after printing are stoved and varnished, and stoved or varnished and stoved and polished in the usual manner.

Shellac, or copal, or other suitable varnishes are employed.

hat we claim as the improvements in machinery for printing metal plates is- 1. In a lithographic machine for printing metal plates, the reciprocating table for carrying the stone or printingsurface, in combi nation with the impression-cylinder 0, having a layer of yielding substance, 0, to receive the impression from the printingsurfaee during the movement of the table I), and the pressure-cylinder (Z, substantially as set forth.

2. In a lithographic machine for printing metal plates, the iinpression-cylinder 0, having a yielding surface, 0, and stop 6, combined with the pressurecylinder d and reciprocating table Z), substantially as and for the purposes set forth.

Signed at the city of New York this 9th day of June, 1884:.

STEPHEN A. GINNA, RICHARD A. DONALDSOIT.

Witnesses:

HERMAN Gnsrou', Units. O. GILL. 

